Vanderhyde Kennel uses tenant-days as its measure of activity; an animal housed in the kennel for one day is counted as one tenant-day. During May, the kennel budgeted for 3,330 tenant-days, but its actual level of activity was 3,373 tenant-days. The kennel has provided the following data concerning the formulas used in its budgeting and its actual results for May: Data used in budgeting:

	Fixed element per month			Variable element per tenant-day
Revenue				$	39.00
Wages and salaries	$	3,800		$	7.50
Food and supplies		2,020			13.90
Facility expenses		10,200			5.30
Administrative expenses		10,000			1.00
Total expenses	$	26,020		$	27.70

Actual results for May:

Revenue	$	135,747
Wages and salaries	$	30,413
Foods and supplies	$	47,590
Facility expenses	$	27,067
Administrative expenses	$	13,108

The net operating income in the planning budget for May would be closest to:

$12,025

$11,609

$17,614

$18,078